The Curt Trailer Hitch Receiver # C11527 on your 2018 Buick Encore is a class I hitch. Only the the Hollywood Racks Trail Rider # HR200Z will be compatible with your hitch. The Curt # C18085 is a very similar rack in almost every way except it is only rated for class II and class II hitches so it will not work for you.
The # HR200Z is a good choice and can secure up to 2 bikes that weigh 45 lbs each by the frame with its hooks and it measures 12-1/2" from the center of the hitch pin... view full answer...